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Test of the running of $\alpha_{s}$ in $\tau$ decays
The decay rate of the \tau lepton into hadrons of invariant mass smaller than \sqrt{s_0}\gg\Lambda_{\rm QCD} can be calculated in QCD assuming global quark--hadron duality. It is shown that this assumption holds with high accuracy for s_0>0.7~GeV^2. From measurements of the hadronic mass distribu...
| Autores principales: | , |
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| Lenguaje: | eng |
| Publicado: |
1995
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| Materias: | |
| Acceso en línea: | https://dx.doi.org/10.1103/PhysRevLett.76.3061 http://cds.cern.ch/record/291806 |